Magnetic-Field-Independent Ultrasonic Dispersions in the Magnetically Robust Heavy Fermion System SmOs4Sb12

Yanagisawa, Tatsuya; Ikeda, Yoichi; Saito, Hitoshi et al.

Journal of the Physical Society of Japan, 2011, 80(4), 043601

Permalink : https://hdl.handle.net/2115/45356

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アクセス権
open access
URI
https://hdl.handle.net/2115/45356
タイトル
Magnetic-Field-Independent Ultrasonic Dispersions in the Magnetically Robust Heavy Fermion System SmOs4Sb12
著者
Yanagisawa, Tatsuya ; Ikeda, Yoichi ; Saito, Hitoshi ; Hidaka, Hiroyuki ; Amitsuka, Hiroshi ; Araki, Koji ; Akatsu, Mitsuhiro ; Nemoto, Yuichi ; Goto, Terutaka ; Ho, Pei-Chun ; Baumbach, Ryan E. ; Maple, M. Brian
e-Rad_Researcher
10456353
著者名
Yanagisawa, Tatsuya
著者名
Ikeda, Yoichi
著者名
Saito, Hitoshi
著者名
Hidaka, Hiroyuki
著者名
Amitsuka, Hiroshi
著者名
Araki, Koji
著者名
Akatsu, Mitsuhiro
著者名
Nemoto, Yuichi
著者名
Goto, Terutaka
著者名
Ho, Pei-Chun
著者名
Baumbach, Ryan E.
著者名
Maple, M. Brian
言語
英語
キーワード
filled skutterudite
heavy fermion
rattling
elastic constant
ultrasonic dispersion
発行日
2011
出版者
Physical Society of Japan
収録物名
Journal of the Physical Society of Japan
巻(号)
80(4)
ページ
043601
記述
LETTERS
抄録
Elastic properties of the filled skutterudite compound SmOs4Sb12 have been investigated by ultrasonic measurements. The elastic constant C11(ω) shows two ultrasonic dispersions at ∼15 and ∼53 K for frequencies ω between 33 and 316 MHz, which follow a Debye-type formula with Arrhenius-type temperaturedependent relaxation times and remain unchanged even with applied magnetic fields up to 10 T. The corresponding activation energies were estimated to be E2 = 105 K and E1 = 409 K, respectively. The latter, E1, is the highest value reported thus far in the Sb-based filled skutterudites. The presence of magnetically robust ultrasonic dispersions in SmOs4Sb12 implies a possibility that an emergence of a magnetically insensitive heavy fermion state in this system is associated with a novel local charge degree of freedom, which causes the ultrasonic dispersion.
資源タイプ
学術雑誌論文
出版タイプ
Accepted Manuscript
権利情報
©2011 The Physical Society of Japan
PISSN
0031-9015
EISSN
1347-4073
関連情報 (isVersionOf)
出版社版DOI
https://doi.org/10.1143/JPSJ.80.043601